Observation of edge instability limiting the pedestal growth in tokamak plasmas

A Diallo, JW Hughes, M Greenwald, B LaBombard… - Physical review …, 2014 - APS
With fusion device performance hinging on the edge pedestal pressure, it is imperative to
experimentally understand the physical mechanism dictating the pedestal characteristics …

Multipoint observations of dipolarization front formation by magnetotail reconnection

A Runov, V Angelopoulos… - Journal of Geophysical …, 2012 - Wiley Online Library
We present multipoint observations of magnetotail plasma sheet dynamics during an event
in which magnetic reconnection and dipolarization were observed at− 16< X<− 15 RE (mid …

Observational evidence for an inside-out substorm onset scenario

MG Henderson - Annales Geophysicae, 2009 - angeo.copernicus.org
We present observations which provide strong support for a substorm expansion phase
onset scenario in which a localized inner magnetospheric instability developed first and was …

Open Geospace General Circulation Model simulation of a substorm: Axial tail instability and ballooning mode preceding substorm onset

J Raeder, P Zhu, Y Ge, G Siscoe - Journal of Geophysical …, 2010 - Wiley Online Library
Recent global simulations of substorms show that before the onset of near‐Earth
reconnection the pressure equilibrium in the tail breaks down. This instability has no cross …

[HTML][HTML] Nonlinear saturation of kinetic ballooning modes by zonal fields in toroidal plasmas

G Dong, J Bao, A Bhattacharjee, Z Lin - Physics of Plasmas, 2019 - pubs.aip.org
Kinetic ballooning modes (KBMs) are widely believed to play a critical role in disruptive
dynamics as well as turbulent transport in magnetic fusion and space plasmas. While the …

Initiation of ballooning instability in the near-Earth plasma sheet prior to the 23 March 2007 THEMIS substorm expansion onset

P Zhu, J Raeder, K Germaschewski… - Annales …, 2009 - angeo.copernicus.org
In this work, we analyze the ballooning stability of the near-Earth plasma sheet prior to the
initial expansion onset of the 23 March 2007 THEMIS substorm event. Using solar wind data …

Identification of substorm onset location and preonset sequence using Reimei, THEMIS GBO, PFISR, and Geotail

S Zou, MB Moldwin, LR Lyons… - Journal of …, 2010 - Wiley Online Library
We present state‐of‐the‐art multiple instrument observations of an isolated substorm on
October 12, 2007. The auroral breakup was observed simultaneously by Reimei, THEMIS …

Structure, force balance, and evolution of incompressible cross‐tail current sheet thinning

MH Saito, D Fairfield, G Le, LN Hau… - Journal of …, 2011 - Wiley Online Library
THEMIS five‐point observations on April 8, 2009 were used to study thinning of the current
sheet in the near‐Earth tail that led to the onset of a small substorm. Taking advantage of a …

[PDF][PDF] Auroral signatures of ballooning mode near substorm onset: open geospace general circulation model simulations

J Raeder, P Zhu, Y Ge, G Siscoe - Auroral phenomenology and …, 2012 - squirrel.sr.unh.edu
We present results from Open Geospace General Circulation Model simulations of the 23
March 2007 THEMIS “first light” substorm. We investigate the relation between ballooning …

Statistical characteristics and significance of low‐frequency instability associated with magnetic dipolarizations in the near‐Earth plasma sheet

MY Park, DY Lee, S Ohtani… - Journal of Geophysical …, 2010 - Wiley Online Library
Magnetic dipolarization has been considered as a key element of substorm phenomena. In
this work we investigate the spectral features of the magnetic dipolarization fluctuations in …